Rubber composition
AssigneeBridgestone Corporation
InventorsHitoshi Kondo, Hirokazu Taniguchi, Yuzo Sakai
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Abstract
A rubber composition for cleaning a metal mold comprises a rubber, an aminoalcohol, a glycol, an adsorptive, and if desired, an organic silane of the formula, Z.sup.1 --Alk.sup.1 --S.sub.n --Alk.sup.2 --Z.sup.2 where Z.sup.1 and Z.sup.2 are --Si(R.sup.1) (R.sup.2)(R.sup.3) where R.sup.1, R.sup.2 and R.sup.3 are C.sub.1-4 alkoxy, Alk.sup.1 and Alk.sup.2 are C.sub.1 -C.sub.6 hydrocarbylene, n is 2-6, or an organic peroxide having a predetermined half-life due to decomposition. Metal molds are cleaned by bringing the above-mentioned rubber composition into contact with a surface of a dirtied metal mold and heating.
Claims27
A rubber composition for cleaning a metal mold, comprising 100 parts by weight of a rubber selected from the group consisting of natural rubber, synthetic rubber and mixtures thereof, 2-30 parts by weight of an aminoalcohol, 5-30 parts by weight of a glycol, 30-90 parts by weight of an adsorptive, and 0.1-10 parts by weight of an organic silane of the formula,
- Z.sup.1 --Alk.sup.1 --S.sub.n --Alk.sup.2 --Z.sup.2
- where Z.sup.1 and Z.sup.2 are independently ##STR3## in which R.sup.1, R.sup.2 and R.sup.3 may be the same or different and each represents an alkoxy group having 1-4 carbon atoms, Alk.sup.1 and Alk.sup.2 may be the same or different and each represents a divalent hydrocarbon radical having 1-6 carbon atoms and n is 2-6.
A rubber composition for cleaning a metal mold, comprising 100 parts by weight of a rubber selected from the group consisting of natural rubber, synthetic rubber and mixtures thereof, 2-30 parts by weight of an aminoalcohol, 5-50 parts by weight of a glycol, 30-90 parts by weight of an adsorptive, and 0.5-10 parts by weight of an organic peroxide having a half-life due to decomposition of at least one minute at a heating temperature at which the rubber composition is used.
Dependencies are inferred from the claim text.